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Finding the Fourth Proportional to 849.92, 1,274.42 and 479.58

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Solution

The fourth proportional to 849.92, 1,274.42 and 479.58 is: 719.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.92 : 1,274.42 = 479.58 : x
  2. Step 2: Convert to fraction form
    849.92/1,274.42 = 479.58/x
  3. Step 3: Cross multiply
    849.92x = 1,274.42 × 479.58
  4. Step 4: Simplify right side
    849.92x = 611,186.34
  5. Step 5: Solve for x
    x = 611,186.34/849.92
  6. Step 6: Final answer
    x = 719.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.